Method and apparatus for tube expansion

Details Method and apparatus for tube expansion Method and apparatus for tube expansion

1985-07-17

1987-06-16

Spruill, Robert L.

Metal deforming

By application of fluent medium, or energy field

Using fixed die

72 63, 72706, 72 54, B21D 3920

Patent

active

046728325

ABSTRACT:
An apparatus and method for radially expanding a tubular member and comprising first and second spaced apart end caps rigidly connected to each other by a post. An expandable bladder fixed to each end cap and extending around the post to define an annular space. A propellant disposed in the annular space and ignition apparatus associated with the propellant. The propellant being of the type which burns rapidly to generate large amounts of gas for expanding the bladder. The tubular member being disposed around the bladder for radial expansion.

REFERENCES:
patent: 3206845 (1965-09-01), Crump
patent: 3220103 (1965-11-01), Simons
patent: 3222902 (1965-12-01), Brejcha
patent: 3397563 (1968-08-01), Pelton
patent: 3593551 (1971-07-01), Roth
patent: 3631699 (1972-01-01), Roth
patent: 3661004 (1972-05-01), Lee
patent: 3688535 (1972-09-01), Keinanen
patent: 3751954 (1973-08-01), Ezra et al.
patent: 3863327 (1975-02-01), Legate
patent: 4120439 (1978-10-01), Persson
"Steam/Its Generation and Use", Babcock & Wilcox, 1972, pp. 23-9-23-11.
"Standard Handbook for Mechanical Engineers", Baumeister, editor, 7th ed. 1967, pp. 9-52 and 9-53.

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